Make addImportPath() work for windows paths starting with lower case

Was causing assert failure on windows if the 'c:' was lower case,
since it was being added to the import path database with a lower
case and thus later lookups with an upper case 'c:' would fail.
This change fixes the check for whether the path refers to a
local path or not.

Task-number: QTBUG-16885
Change-Id: I0a2a2f705443ed453fb2b13f8599e035c2bd2877
Reviewed-by: Martin Jones
(cherry picked from commit 33512bc223be373975426ffcc6f8fa783a7582c9)

2 files changed, 15 insertions, 3 deletions

diff --git a/src/declarative/qml/qdeclarativeimport.cpp b/src/declarative/qml/qdeclarativeimport.cpp
index 87183c4..244f2ad 100644
--- a/src/declarative/qml/qdeclarativeimport.cpp
+++ b/src/declarative/qml/qdeclarativeimport.cpp
@@ -952,7 +952,8 @@ void QDeclarativeImportDatabase::addPluginPath(const QString& path)
         qDebug().nospace() << "QDeclarativeImportDatabase::addPluginPath: " << path;
 
     QUrl url = QUrl(path);
-    if (url.isRelative() || url.scheme() == QLatin1String("file")) {
+    if (url.isRelative() || url.scheme() == QLatin1String("file")
+            || (url.scheme().length() == 1 && QFile::exists(path)) ) {  // windows path
         QDir dir = QDir(path);
         filePluginPath.prepend(dir.canonicalPath());
     } else {
@@ -974,7 +975,8 @@ void QDeclarativeImportDatabase::addImportPath(const QString& path)
     QUrl url = QUrl(path);
     QString cPath;
 
-    if (url.isRelative() || url.scheme() == QLatin1String("file")) {
+    if (url.isRelative() || url.scheme() == QLatin1String("file")
+            || (url.scheme().length() == 1 && QFile::exists(path)) ) {  // windows path
         QDir dir = QDir(path);
         cPath = dir.canonicalPath();
     } else {
diff --git a/tests/auto/declarative/qdeclarativemoduleplugin/tst_qdeclarativemoduleplugin.cpp b/tests/auto/declarative/qdeclarativemoduleplugin/tst_qdeclarativemoduleplugin.cpp
index 9ec0f84..8e31fd1 100644
--- a/tests/auto/declarative/qdeclarativemoduleplugin/tst_qdeclarativemoduleplugin.cpp
+++ b/tests/auto/declarative/qdeclarativemoduleplugin/tst_qdeclarativemoduleplugin.cpp
@@ -191,8 +191,18 @@ void tst_qdeclarativemoduleplugin::incorrectPluginCase()
 
 void tst_qdeclarativemoduleplugin::importPluginWithQmlFile()
 {
+    QString path = QLatin1String(SRCDIR) + QDir::separator() + QLatin1String("imports");
+
+    // QTBUG-16885: adding an import path with a lower-case "c:" causes assert failure
+    // (this only happens if the plugin includes pure QML files)
+    #ifdef Q_OS_WIN
+        QVERIFY(path.at(0).isUpper() && path.at(1) == QLatin1Char(':'));
+        path = path.at(0).toLower() + path.mid(1);
+    #endif
+
     QDeclarativeEngine engine;
-    engine.addImportPath(QLatin1String(SRCDIR) + QDir::separator() + QLatin1String("imports"));
+    engine.addImportPath(path);
+
     QDeclarativeComponent component(&engine, TEST_FILE("data/pluginWithQmlFile.qml"));
     foreach (QDeclarativeError err, component.errors())
         qWarning() << err;